So Microsoft announces their next Tablet the Surface Pro via Twitter today. The Tablet will run a steep $899 for 64 GB. Now on to the battery life. According to their twitter account the Surface Pro will have half the battery life of the Surface R/T. The Surface R/T had a battery life of 8 hours max. So your looking at 4 hours. Why is the Surface Pro getting only 4 hours? Well unlike the iPad the Surface pro will be running on i5 processor and the device is touchscreen thats sure to drain the devices battery.